José Júlio Alferes Luís Moniz Pereira Halina Przymusinska Teodor C. Przymusinski Paulo Quaresma Dynamic Knowledge Representation and Its Applications. 1-10 http://link.springer.de/link/service/series/0558/bibs/1904/19040001.htm 2000 conf/aimsa/2000 AIMSA db/conf/aimsa/aimsa2000.html#AlferesPPPQ00